assureIf you assure someone that something is true or will happen, you tell them that it is definitely true or will definitely happen, often in order to make them less worried.He hastened to assure me that there was nothing traumatic to report... 他忙急忙地向我保證，並沒有什麼悲慘的事要訴說。To assure someone of something means to make certain that they will get it.Last night's resounding victory over Birmingham City has virtually assured them of promotion... 昨晚大勝伯明罕城隊實際上已確保他們能夠晉級。You use phrases such as I can assure you or let me assure you to emphasize the truth of what you are saying.I can assure you that the animals are well cared for... 我可以向你保證動物們得到了精心照顧。

insureIf you insure yourself or your property, you pay money to an insurance company so that, if you become ill or if your property is damaged or stolen, the company will pay you a sum of money.For protection against unforeseen emergencies, you insure your house, your furnishings and your car... 為了防範不可預見的緊急情況,人們給房子、傢俱和汽車上保險。If you insure yourself against something unpleasant that might happen in the future, you do something to protect yourself in case it happens, or to prevent it happening.All the electronics in the world cannot insure against accidents, though. 世上沒有哪種電子器材能完全避免意外事故的發生。

ensureTo ensure something, or to ensure that something happens, means to make certain that it happensBritain's negotiators had ensured that the treaty which resulted was a significant change in direction... 英國談判代表已經擔保由此而簽訂的條約將是方向上的重大改變。